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• Brute Force Hardware versus Tuning

  - by jchang

  Every now and then, the question is asked “When will servers be powerful enough that performance tuning will not be necessary.” Sometimes I get the impression this was posed not on technical grounds, but rather that ISVs and CIOs don’t like performance specialists. Fortunately (for me) it does not appear that this will ever happen for two principal reasons: 1) hardware and tuning contribute in such completely different aspects that neither can be ignored, and 2) multi-core processors actually introduce...(read more)

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• upgrade from ubuntu 12.04 to 12.10 failed, now loads "grub rescue"

  - by Greg

  I attempted to upgrade from 12.04 to 12.10 last night. Installation seemed to go fine, and this morning I had a message like "restart now to complete installation". So I restart, get an initial "Loading Operating System ..." message, followed by "error: file not found. Then it kicks into "grub rescue" mode. Previously I have this running as a dual boot (window 7) and I just ran the upgrade to 12.10 via the update manager in ubuntu. Any ideas on what is going on here, or what the error means? I know my way around the command line, but this is above my pay grade. Thanks for any advice.

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• Grub can't find device on boot resulting in Grub Rescue

  - by user1160163

  So I have 2 hard drives a HDD 320GB and a SSD 20GB. Before I had Windows 7 on the HDD and Ubuntu on the SSD but wanted to get rid of windows and reinstall a clean Ubuntu on the SSD then use the HDD for storage. So I deleted everything from the HDD and set up the SSD with 18GB ext4 and 2GB Swap and installed Ubuntu on the 18GB ext4. Though now when I boot up I get "Error: No such device Grub Rescue" I have a live USB and I ran the Boot Repair following these instructions - grub rescue after install of Ubuntu 12.04 (dual boot) - it says successful though still have the same problem. This is the given URL from Boot Repair - http://paste.ubuntu.com/1257988/ Thanks for any help given.

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• Resuming from hibernation shows a fuzzy "static" screen

  - by Ross

  When I resume from hibernation in Ubuntu 10.10 the screen shows static, very similar to what you see on an analogue TV that hasn't been tuned properly. This also occurs on boot from shut down, but only for a moment after the Plymouth boot screen. The static lasts for at least 5 minutes. An odd thing that happens is that the mouse pointer, as a lighter square of static, becomes visible and you can move it around. Attempting to change into a terminal (i.e. Ctrl+Alt+F1) doesn't seem to work (and I'm not sure if that can be done from the login screen). Resuming from suspend has different issues - vertical lines appearing for a second before appearing to be in terminal mode (blinking cursor) and then going to the lock screen. I'm running Ubuntu 10.10 on a Dell Studio 15 with ATI graphics, however I'm not using the proprietary drivers as I had issues with dual-screen support, so it's the generic X.org drivers being used.

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• How do I completly remove software? [closed]

  - by Dustin

  Possible Duplicate: Why are the hidden settings-folders not deleted when purging an application? Ok I have 8GB on my desktop dual booting win 7. I installed a few games, assualtcube, tremolous, and spring. But I had removed them using 'remove --purge' and only to find they are still lingering and purge does not well truly purge them. I need them completely gone and not secretly hogging space when I purged them. How can i completely remove software, like it is gone and not going to take any more of my precious space? Shrinking 7 and growing Ubuntu is not an answer I am accepting, i want to know how to completely remove software. Thank you for your time and your answers.

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• vga_switcheroo and Intel HD 3000 on Ubuntu 12.04

  - by Ikalou

  I'm trying to get vga_switcheroo to enable my integrated Intel HD 3000 instead of my ATI card. My problem is that there is no vgaswitcheroo directory in /sys/kernel/debug/ on my system. > grep -i switcheroo /boot/config-3.2.0-26-generic CONFIG_VGA_SWITCHEROO=y And yet: > sudo ls /sys/kernel/debug/ acpi bdi bluetooth dri extfrag gpio ieee80211 kprobes mce mmc0 regmap regulator sched_features suspend_stats tracing usb wakeup_sources x86 I am NOT using the fglrx driver. Here is the output of lspci; glxinfo | grep renderer: 00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09) 00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (rev 09) 00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04) 00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network Connection (rev 04) 00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 04) 00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 04) 00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b4) 00:1c.1 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 2 (rev b4) 00:1c.2 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 3 (rev b4) 00:1c.3 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 (rev b4) 00:1c.7 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 8 (rev b4) 00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 04) 00:1f.0 ISA bridge: Intel Corporation QM67 Express Chipset Family LPC Controller (rev 04) 00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family 6 port SATA AHCI Controller (rev 04) 01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Seymour [Radeon HD 6400M Series] 01:00.1 Audio device: Advanced Micro Devices [AMD] nee ATI Caicos HDMI Audio [Radeon HD 6400 Series] 24:00.0 FireWire (IEEE 1394): JMicron Technology Corp. IEEE 1394 Host Controller (rev 30) 24:00.1 System peripheral: JMicron Technology Corp. SD/MMC Host Controller (rev 30) 24:00.2 SD Host controller: JMicron Technology Corp. Standard SD Host Controller (rev 30) 25:00.0 Network controller: Intel Corporation Centrino Advanced-N 6205 (rev 34) 26:00.0 USB controller: NEC Corporation uPD720200 USB 3.0 Host Controller (rev 04) OpenGL renderer string: Gallium 0.4 on AMD CAICOS Both xserver-xorg-video-intel and xserver-xorg-video-radeon packages are installed. I know there are tons of posts about hybrid-graphics already but I couldn't quite find a solution to my problem. Does anyone know why is /sys/kernel/debug/vgaswitcheroo not showing?

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• No Internet Connection - ubuntu 11.10

  - by emersonhsieh

  I installed Ubuntu 11.10 recently. After the first bootup the computer freezes so I have to force-quit my computer. Then I turned on my computer after that. I tried connecting to the internet. My (and my neighbor's) wireless networks shown up, but no matter how many times I tried, I can't connect to my home network. I checked the password and the other laptop's internet works (a MacBookPro). It was a wireless network. What's weird is that the Wireless network worked when I was installing ubuntu How can I connect to the internet now? I don't have a wired network. Please Help! Any help will be appreciated Specs: ASUS F81Se, Windows 7 Dual-boot, I remember the wireless card was made by Atheros, 4GB RAM

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• No options for sound output

  - by Chef Flambe

  Newbie here. Trying out Ubuntu for kicks. I have a 10.04 Ubuntu system dual booting on my Windows 7 laptop, fully updated, an Asus A53S. I have an external Samsung monitor/tv hooked up via HDMI. I'm getting sound from the external monitor fine when using Win7 but can't get anything with Ubuntu. I've read threads here about similar stuff and they say go check my sound options but I don't have any additional options than the one listed - Internal Audio. What else can I check/do?

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• Game engine development in C++ [closed]

  - by Chris Cochran

  I am arriving at completion on a multithreaded concurrency framework designed for high-performance computing. Though I am not a gamer, it has occurred to me that this stand-alone software core could be an ideal basis for a multiprocessor game engine (64-bit native C++, 5000+ entry points). Are there any websites I could visit to discuss this technology with programmers and developers who could really benefit from it?

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• kubuntu 12.04 won't start

  - by daker

  I have dual boot config with kubuntu 12.04 and Windows7. My problem started this morning when I tried to boot kubuntu. Everything worked fine a couple of days ago and I have not done any mayor system configurations since then. Choosing kubuntu options from grub gives me this screen A couple of minutes later this screen is shown And then it gets stuck. Have been waiting for ~5mins without anything happening. I have tried running fsck from recovery menu without any errors. I have also tried booting in failsafex mode which gives me "Fatal server error: no screens found". apt-get update gives me "Duplicate sources.list entry". I have also tried fixing broken packages from recovery menu. What should I do next?

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• Changing Workspaces changes active window

  - by puk

  I have a dual monitor setup, but I am sure it's the same with a single monitor. If I have two applications open, one is vim, the other is google chrome. Lets say the focus is on vim. If I switch to another workspace (ie. alt3) then switch back to that workspace (ie. alt1) now the focus is on google chrome. This process toggles indefinitely so long as I don't transition too quickly. Is there any way to prevent/disable this?

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• Incorrect key mappings in remote NX session

  - by Roger Light

  I'm using the NoMachine provided NX client on Ubuntu 10.10 running on a laptop. I'm connecting to a FreeNX server that happens to be running on openSUSE. I'm having trouble with keys being incorrect in the remote session. The most noticable example is that when I press up cursor, the screen shot dialog appears instead. As far as I can gather easily, the cursor keys and delete are affected. It's worth noting that it doesn't display the same behaviour if I dual boot to Windows XP, or from a different machine using openSUSE. I'm not really sure where to begin looking. Any suggestions?

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• High temperature on my laptop with Radeon Mobility HD4670

  - by Lorthirk

  As almost everyone here, I guess, in these days I downloaded Quantal Quetzal to give it a try. However I noticed that my laptop runs fairly hot with cooling fans almost always on, even sitting in the desktop doing nothing. I downloaded XSensor to read temperature sensors, and I saw that while CPU stays on about 65°C, so quiet normal I guess, the GPU sits at 75°C. In comparison my actual Windows 7 installation, which dual boots witb Quantal, stays at 59°C CPU and 65°C. So I went reading and learned that AMD dropped support for my video card from fglrx package, and that fglrx-legacy won't support 1.13 Xorg, so I'm basically stuck with OSS drivers. So I was guessing if there's anything I can try, and if it's possible that the OSS drivers could be the cause of the high temperature?

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• Cannot boot from Ubuntu USB

  - by Safi

  I create a ubuntu 10.10 bootable USB via the method that is described on the download page of ubuntu. I made that from windows and also from ubuntu 10.04 (I have dual boot). When I boot from the USB made, the menu shows and when I run it, it gives a beep and nothing else. It never boots. USB creation from both methods result the same. I downloaded ubuntu via the torrent provided from Ubuntu. Any help will be very appreciated. I want to make my USB just like a Live CD so that I can run it on some other computers also.

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• Broadcom bcm4311 rev2 Full disabled on battery

  - by Antonio BG

  Ok this is my problem... My problem begins while ago when I installed ubuntu 10.10. (is the same with 11.04,11.10...) My wireless card is disabled if the power cord is unplugged, and the only way to fix this is rebooting my pc WITH the power cord plugged and if I use lspci command, it doesn't show me the wireless card. is like if I've removed the wireless board from my laptop port. I've searched a lot of solutions for bcmw4311 issues, but none of them fix my problem because when apply one of the fixes, if I unplug the cord, my wireless card it just gone away... I have dual boot on my pc(w7,ubuntu), I've tried with full installation just to see if this is the problem, but not, is the same. On windows all work correctly with and without power cord.. so this is not a hardware problem, is more like a kernel problem. anyway I can use wireless with power cord plugged, but c'mon this is a laptop not a desktop pc XD haha any help is welcome

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• System checks for disk drive error every time it boots

  - by Starx

  When my disk space for the ubuntu installation partition was getting low, from a live cd, I used gparted to increase its volume capacity, but deleting another partition and merging it to the ubuntu partition. Since then onwards, I am receiving disk checking for errors at boot screen for my partitions, always. What seem to be causing this and how to fix it? Update Here is my boot.log if it provides few insight fsck from util-linux 2.19.1 fsck from util-linux 2.19.1 /dev/sda1 was not cleanly unmounted, check forced. ubuntu: clean, 501325/1310720 files, 2958455/5242880 blocks /dev/sda1: 241/51272 files (3.3% non-contiguous), 73541/102400 blocks mountall: fsck /boot [358] terminated with status 1 Skipping profile in /etc/apparmor.d/disable: usr.bin.firefox ... /dev/sda1 is a separate grub partition for my dual OS's

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• Ubuntu 13.10 gets stuck on boot

  - by Robert frost

  I have updated (via the Software Updater) Ubuntu 13.04 to Ubuntu 13.10. After it had finished the installation, the system required a reboot. When I reboot and load Ubuntu it will get stuck on the logo. I managed to boot into the recovery (both console and graphics mode) but I can't figure out how to repair it. I have tried a sudo update-grub, but nothing different happened. I have also tried sudo apt-get install gnome, but the same result... I am using a dual-boot Win7 + Ubuntu.

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• Ubuntu 12.04 Battery problem

  - by Rahul

  I have my laptop ( Dell Inspiron 14R) on dual boot with Ubuntu 12.04 and Windows 7. While using Windows 7, I used to get about 2.5-3 hours on battery fully charged (with my cellphone connected for 3g Internet). The battery is almost 2 years old. But in Ubuntu 12.04, I'm getting only about 1-1.5 hrs on battery. I tried installing jupiter, also tried some tweaks that were mentioned in the forums, like editing the grub file. But nothing seems to work. I am not sure if any app is draining the battery. The one application that I use always is firefox. It's always open. Is there any way I could get at least 2.5 hrs of battery time?

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• Lexmark X7170 shows documents as printed when they haven't

  - by Mehmet

  I made the move from Windows 7 to Ubuntu not dual booting because I have decided to quit gaming to spare more time for my studies. I just needed an OS for browsing the web and word processing etc. After I installed Ubuntu I installed the AMD GPU drivers, after which I clicked on the little printer icon, selected add printer and it found the drivers for the Lexmark 7000 series and I installed them. Now my problem is when I print something from Writer it processes it thinks its completed it, when in fact it hasn't printed anything. I tried printing a test page but it was stuck on processing for 5 minutes. I have restarted my computer and turned the printer on and off. I'm running 64bit if that changes anything.

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• Traits of a DBA - Part One – The Technical Side

  What does it take to become a database administrator, or what kinds of traits should I be looking for when I am hiring a DBA. Those traits can be summarized it two categories: Technical and Personal. In this article, Greg Larsen discusses the technical traits a DBA should have. Free eBook - Performance Tuning with DMVsThis free eBook provides you with the core techniques and scripts to monitor your query execution, index usage, session and transaction activity, disk IO, and more. Download the free eBook.

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• Unable to install Steam 64bit - Wrong architecture (Lubuntu 12.04)

  - by Ian

  I'm on a new install of Lubuntu 12.04 on an Acer Aspire 5534 (specifications here, tl;dr: AMD dual-core 64bit) trying to install steam_latest.deb from the Steam website. When I open gdebi to install, it tells me that it's uninstallable because it's for a i386 architecture. I've tried installing ia32-libs (installed, no success), gdebi --add-architecture i386 (with and without --force, command unknown). This is all I've found to fix the problem, but none of it has worked for me. Any suggestions are welcome, thanks for your time.

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• Algorithm to increase odds of matching when randomly selecting

  - by Bryan

  I am building a mobile game loosely based on dual n-back http://brainworkshop.sourceforge.net/tutorial.html Now with the game I have 9 squares (numbered 1 through 9) and 9 letters (A through K) In the current code, I randomly select a square (e.g. 3) and a letter (e.g. C), then repeat the random selection for the next turn. For 1-back, I test whether either, neither or both match the previous turn. The problem with my current code is I get very few matches - I can go through many turns without having either match. How can I increase the match frequency, or alternatively decrease the randomness so a match is more likely? I am not looking for specific code (but pseudo-code would be fine) - just more an approach to increase match frequency.

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• Boots to a totally blank screen after I installed some ATI Radeon card updates

  - by baboonWorksFine

  I am using Ubuntu 10.04 LTS, dual boot with win7 on ThinkPad T400, I followed Ubuntu update hints and installed some update for my ATI Radeon graphic card, but when I boot to Ubuntu(means I can still load GRUB), the tragedy happened, the screen goes to blank and no matter what key stroke, I can not get any responds, I try to go to text terminal, but impossible! However when I hit the power button, the computer would pop out the Ubuntu shutdown screen briefly and shut down. I figure out I should delete the updates package of my graphic card, but I don't even get a chance to go to text terminal, please help me!

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• Facebook C# SDK submitted to the Outercurve Foundation

  - by The Official Microsoft IIS Site

  I am pleased to announce another open source milestone as we continue to deliver on our commitment to Interoperability: today, the Facebook C# SDK was submitted to the Outercurve Foundation’s Data, Languages, and Systems Interoperability gallery. This project is a set of libraries that enables developers of all Microsoft platforms, as well as Mono, to build applications that integrate with Facebook. The project contains core libraries for authentication and calling Facebook APIs. Additionally...(read more)

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• Ubuntu 12.04 freezing on startup

  - by Frank

  Have been looking everywhere to find a solution to this problem but have yet to find a solution. I am running 64 bit 12.04 LTS on a AMD C-50 Dual core 6 gigs ram AMD Ratheon HD 6250. The problem I am experiencing is when ubuntu gets to the wallpaper screen it will sometimes freeze soon after the the image appears or shortly there after gnome loads locking up keyboard and mouse. When I try to log in via the console the same thing happens (this is as ubuntu is loading). At the moment the system is set to auto login previously it was set to ask for password but it did the same thing. Switching to from lightdm to gdm did nothing to alleviate the issue. I have never had so many issues with ubuntu I have to say 12.04 is the most buggy version yet.

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